Resilient tire



Aug. 28, 1923. 1,466,133

- c. G. LUNDSTROM RES'ILIENT TIRE Fild Sept. 13 1921 2 Sheets-Sheet 1 Aug. 28, 1923.

c. G. LUNDSTROM RESILIENT TIRE:

Filed Sept. 13 1921 2 Sheets-Sheet 2 w i \M Patented Aug. 28, 1923.

air s r are GAR-L e. LUNDsraor/i', or isoolvn rowaf retain Fi T ansrmnur TIRE.

.Applicationfiled September 13, 1921. Serial No. 500,422}

and useful Resilient Tire, of which the following is a specification.

The object of my invention is to provide a resilient tire for vehicle wheels, of simple, durable and inexpensive construction arranged with atread having a cushion member, mounted in such a manner that the tread member may be held firmly in position relative to the cushion member, and-at the same time be adapted to be removed without having to renew the cushion member, whenever the said tread member has become worn.

A further object is to provide a resilient tirefor vehicle wheels, formed of a material having different degrees of resiliency and constructed in such a manner that the tire is adapted to carry variable loads and at the same time produce maximum shock absorbing qualities, either loaded or unloaded.

A further object is to provide in a resilient tire for vehicle wheels having a series of separate and co-acting and resilient members, new and improved means for securing the said resilient members together and to the wheel of a vehicle.

These and other objects will be apparent to those skilled in the art.

Hy invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which: 7 r

Figure 1 is a perspective View of my improved resilient tire showing the manner in which it is applied to a vehicle wheel, and also showing a portion of the tread member broken away to show its construction.

view taken through the felly and my improved tiref Figure 3 is a segmental detail view of the rim flanges showing the manner in which they are locked together.

F 'gure 4 is a perspective view of the cushion portion of my improved tire.

'Thenumeral 10 indicates the felly of an automobile wheel which is provided with the usual felly band 11 such as is used with demountable rims. This band is rigidly se cured to the felly and provided with an inclined edge 12 and also an inclined annular flan e 13. 1 i r hfy improved tire comprises substantially a tread member 14:, a'cushion member 15 and a rim member 16. The tread member 141 comprises substantially an outer portion 14 and a core portion l? and a reinforcing portion 18. The outer portion 1a is formed of comparatively resilient rubber and is pro-- vi'dedwithatread19, w T

This tread portion 19 may be provided with annular corrugations or grooves 20 for the purpose of'preventing the tire from slipping or skidding. -The 1 tread portion is formed substantially semi-circular in cross sections and is provided with a core 17 of semi-circular cross section which is formed of a substance of amore solid nature than the tread portion.

This core 17 extends throughout the full length of thetire and is vulcanized therein; The reinforcing member 18 is secured near the inner'face of the tread and is provided with annular metallic cables 21 which are secured near the side portions of the said tread. The flexible member is formed of a series of layers of vulcanized fabric. This fabric is arranged in layers in such a manner that the said layers surround the cables, and which are also provided with a series of small reinforcing flexible wires 22. The tread 1 1 is provided with an annular groove 23' in each of its faces which is for the purpose of receiving the rim flanges. The mem-.

ber 18 is formed with its central portion bulged or arched, as shown in Figure 2, and is vulcanized into the soft rubber portion 14.

The inner face of the tread portion ll is formed cylindrical and smooth and is designed to receive an annular cushion portion 15, which is formed of very soft and resilient rubber and provided with a series I of oppositely arranged concave pockets 24-. Figure 2 1s a detall transverse sectlonal that a solid portion 26 is provided at each .edge of th cushion member This cushion member is formed or" a'continuous'piece of material and may be inserted within the innerface of the tread portion 14, and is of 'a slightly less width than the said tread'portion. V '1 For locking thecushion portion and the tread portion together and to awheel I have provided the rim 16 which is formed 01"" two pieces, one having an annular portion 27 of a width substantially equal to the width oi the inner face of the cushion member, which'is of considerable less width than its outer face. flange 27 is provided with an outward and curved flange 28 having its outer edge entering one otthe grooves 23 of the tread member 14. I V i This'flange 27 is provided with an annular flange 29, the inner edge of which is b veled to coact with the beveled edge 12, and ot. substantially the samediameter. The other member or the rim 16 is provided 'with an annular portion 30 having an outwardly extending flange 31 Which is curved in the ,opposite direction from the flange 28, and having'its free edge designed to enter the opposite 0116 Of the grooves 23.

Thisannular member 3 is also provided with an annular beveled portion 32 which 7 is designed to coac t with the beveled portion 13. The outer ,diameter of the annular member is slightly less than the inner diameter of the annular member 27 so that the said annular member 30 may enter the said flange 27 The annular members are locked in position relative to each other by a series of bayonet joints 33 which comprise lugs 54; formed in the member 27 extending inwardly and designed to coact with the transversely arranged groove portions communicating with the longitudir al groove portions 36 and placed together y Platns t groo e 3.5 in l ne with h l 4 1 1 mov g th member 310 transversely and inwardly until the lugs 34; are in "line with the grooves 86, after which a rotary movement is imparted to the mem her 7 30 until the said lugs enter the grooves 36.

-When the portions 27- and 30 have been placed together as just described with the cushion 26 and the tread 14 in position, spaces will I be formed between either edge of the cushion and the inner face of the flanges 28 and 31., due to the fact that the said cushion member is of a slightly less widtl thanlthe tread member, as before described. 7 These spaces are for the purpose of permitting the cushion member 26 tobe contracted in thickness which will cause'it to be slightly increased in width.

To prevent moisture and dirt from enter- I ing thespaces 3? and the pockets 24:, I have provided a small annular flange pertion 38 one edge of the inner face of said cushion.

portion designed to enter the groove formed by the edge of the member 27 and the- The outer edge of the To further assist in keeping out the moisture, I have provided an annular groove 40 on the inner face of the member 27 which is designed to receive a resilient packing member ll which may be formed of any in position Within themember 27 the 118 silient member 41 will be compressed in the groove 40 by the member 27 being moved into position. i 7

It will thus be seen that I have provided a resilient tire having a tread portion and a cushion portion Which are locked together by means of the 16, the tread portion of which may be easily and quickly removed when so desired by simply pressing the groove portions 23 together by means of a special mechanism not shown, after which the membersjSO and 257 are free to rotate relative to each other and be easily and quickly detached when the lugs 3r have reached the grooves 35. A new tread may be placed in position by a reverse operation as just described. I

The rim 16 with the tread portion and cushion portion new forms a unit which may be placed on the telly band, as clearly shown in Figure 2, and held in position by means of lugs 42 and bolts 43 which are of the ordinary construction and form no particular part of my present invention.

The operation of my tire in action is sub stantially as follows-r Assuming that the wheel is loaded and that the tread portion 1 9 is in engagement with the ground surface, the s aid'tr.ead poi-,- tion 19' also the outer portion '14 are termed out a tough and vquite resilient mate; a 92 31 he said tread portion will yield light y und r th load and will cause the edges of'the member let to bul e slightly as indicated by dotted li-HBS. The core .17 should be designed stifl' enough so as to carry a load without being distorted or moved materially from its normal position. This is accomplished by the fact that the said member is stif and distributes the load over a considerable area .otvthe resilient rubber portion engaging its inner face which also indirectly distributes the 'load'on the cushion portion 26. But if a shock is i-m parted to the tread portion or the tire, which is the same as increasing the loadseveral:

the cushion 26 which will yield and become 18 assumes a straight line the cables 21 will be moved outward. This will have a tendency to cause the bulged portions l4: to engage the'curved portionsof the membersQS and 31 tighter. If the member 18 were formed straight insteadof arched, when the inward movement occurred, the arch would resiliency of the tire, and these pockets also help to make the inner portion of the cushion more resilient than the outer edges.

in such a manner that the said outer edges will be rigid enough to carry the loads with-.

out settling materially. This also assists in preventing the bulged portions 44 from mov ing relative to the inner faces of the flanges.

The member 18 serves the purpose of preventing the tread member fromstretching and forms a flexible foundation for the tread member. The member 18 may be provided with as many flexible wires 22 as it is found to be necessary in order to give the said member 18 the proper tensile strength. The tread portion will be held against slipping longitudinally in the flanges 28 and 31 due to the torsion of the driving wheels.

Thus it will be seen that I have provided a resilient tire of comparatively simple, durable and inexpensive construction which is very resilient, and which is especially adapted to carry variable loads, and having a tread portion which may be renewed at such times as is found necessary, but without going to the expense of renewing the entire tire portion. 7

I claim as my invention:

1. In a device of the class described, a -resilient annular tread portion having an annular core at its central portion of a less resilient material, and a flexible reinforcing member between the said core and the inner face of said annular tread portion.

2. In 'a device of the class described, a

.resilient annular tread portion having an annular core at its central portion of a less resilient material, and a flexible reinforcing member between the said core and the inner face of said annular tread portion, an annular cushion portion within the tread portion, detachable means for locking said tread portion and said getheru '3. In 'a device of the class described, an annular resilient tread membe'r having an cushion portion toannular central core member, areinforcing;

forcing member comprising a series of spaced annular cables, and a series of inter mediate flexible wires, the said wires and cables being mounted in a series of layers of vulcanized fabric. 7

' 4. In a device of the class described, an

annular resilient tread member having an spaced annular cables, and a series of interv mediate flexible wires, the said wires and cables being mounted in a series of layers of vulcanized fabric, an annular cushion within said tread member and means for detachably securing said cushion and said tread members together.

5. In a device of the class described, an annular resilient tread member having an annular central core member, a reinforcing member in said tread member between the core and its inner annular face, said reinforcing member comprising a series of spaced annular cables, and a series of intermediate flexible wires, the said wires and cables being mounted in a series of layers of vulcanized fabric, an annular cushion member within the inner face of said annular tread member formed of a material having higher resiliency than the tread member, and having its annular faces formed with oppositely arranged concave pockets, detachable means for securing said tread member and said cushion member together.

member in said tread member between the core and its inner annular face, sa1d rem- 6. In a device of the class described, an 7 annular resilient tread member having an annular central core member, a reinforc ing member in said tread member between the core and its inner annular face, saic reinforcing member comprising a series ofspaced annular cables, and a series of intermediate fiexible wires, the said wires and cables being mounted in a series of layers of vulcanized fabric, an annular cushion member within the inner face of said annular tread member formed of a material having higher resiliency than the tread member, and having its annular faces formed with oppositely arranged concavev pockets, said cushion being of a less width than the inner face of said tread member,

annular rim members for engaging the inner side edges of said tread member and the inner annular face of said cushion member for locking said tread member and said cushion member together, and to pro vide expansion spaces at the edges of said cushion member. 7. In a device of the class described, an

annular cushion member having inner and outer parallel faces, each of said faces being 7 provided wioh a series of concave pockets, the inner face being of les Width than its outer face and having one edge provided with an inwardly extending annular flange portion.

8. In a device of the class described, annular resilient tread member hav ng all mean annular central core member va reinforci (Y 7 member in said tre ad neinber between {rho core and itsinr-ier annular face said reinforcing member comprising a" series-0f spaced annular cables, 21 series of intermediate fieXi-ble ires, the said Wires and CARL UNDs aoM, 

